Er含量对FeSiB合金结构演变的影响  

Influence of Er Content on Microstructure Evolution of FeSiB Alloy

作　　者：王官充[1] 冯拉俊[1,2] WANG Guanchong;FENG Lajun(School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China;Key Laboratory of Corrosion and Protection of Shaanxi Province,Xi’an 710048,China)

机构地区：[1]西安理工大学材料学院,西安710048 [2]陕西省腐蚀与防护重点实验室,西安710048

出　　处：《材料导报》2020年第2期2088-2092,共5页Materials Reports

基　　金：国家自然科学基金(51174160);陕西省重点实验室后补助项目(101-424018016)~~

摘　　要：FeSiB非晶合金价格低廉、软磁性能优异,其研究和应用备受关注。为了提高Fe-Si-B的加工性、生产效率和非晶稳定性,研究者通常会引入第四种元素或进行前驱体退火处理。本研究尝试引入Er元素以改善FeSiB的结构和非晶性能。采用铜模吸铸法制备了不同Er含量的Fe75-xB8Si17-Erx(x=0~0.8)(原子分数,%)合金,采用X射线衍射(XRD)仪、透射电子显微镜(TEM)和振动样品磁强计(VSM)表征了掺Er的FeSiB合金的物相组成、微观形貌及磁性能,分析了Er含量对FeSiB合金结构演变的影响。结果表明,当Er的添加量从0%增至0.4%时,Er元素主要改变合金中α-Fe晶粒数量及粒径;在Er含量为0.5时合金形成非晶态;但当Er含量大于0.6%时,合金向过共晶点移动,促进了Fe-B相和Fe-Si相的生成,使得合金的非晶能力下降。FeSiB amorphous alloys feature low price and excellent soft magnetic properties,numerous attentions have been paid to the researches and applications of FeSiB alloys.Usually,a forth element is introduced or precursor annealing is adopted in order to enhance the processability,production efficiency and amorphous stability of FeSiB alloy.In this research work,we attempted to introduce Er elements to ameliorate the structure and amorphous properties of FeSiB alloy.Fe 75-x B 8Si 17 Er x(x=0—0.8)(at%)multi-component alloys have been prepared by suction casting technique using chilled copper die.X-ray diffraction(XRD),transmission electron microscope(TEM)and vibrating sample magnetometer(VSM)were employed to characterize the phase composition,microstructure and magnetic properties of the FeSiBEr alloys,and the effect of Er addition on microstructure evolution of the alloy was investigated.As could be seen from the results,when the Er content increased from 0%to 0.4%,Er played a role in altering the amount and the size ofα-Fe grains in the alloy.The amorphous state of the alloy was formed when Er content reached 0.5,which was evidenced by microscopic visualization.In addition,excessive Er(above 0.6%)addition would drive the alloy towards hypereutectic point,resulting in the formation of Fe-B and Fe-Si crystalline phases,further deteriorating amorphous forming ability of the alloy.

关 键 词：铜模吸铸法 铁基非晶合金 微观结构演变 

分 类 号：TG139.8[一般工业技术—材料科学与工程]